Athlon 64 X2 TK-55 vs Athlon II X4 645
Primary details
Comparing Athlon II X4 645 and Athlon 64 X2 TK-55 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2148 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.30 | no data |
| Market segment | Desktop processor | Laptop |
| Series | no data | 2x Athlon 64 |
| Power efficiency | 1.47 | no data |
| Architecture codename | Propus (2009−2011) | Taylor / Hawk-256 |
| Release date | 21 September 2010 (14 years ago) | no data (2024 years ago) |
| Launch price (MSRP) | $80 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Athlon II X4 645 and Athlon 64 X2 TK-55 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 4 (Quad-Core) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 3.1 GHz | no data |
| Boost clock speed | 3.1 GHz | 1.8 GHz |
| Bus rate | no data | 667 MHz |
| L1 cache | 128 KB (per core) | no data |
| L2 cache | 512 KB (per core) | no data |
| L3 cache | 0 KB | no data |
| Chip lithography | 45 nm | 65 nm |
| Die size | 169 mm2 | no data |
| Number of transistors | 300 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Athlon II X4 645 and Athlon 64 X2 TK-55 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | no data |
| Socket | AM3 | no data |
| Power consumption (TDP) | 95 Watt | 31 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 645 and Athlon 64 X2 TK-55. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | no data |
Peripherals
Specifications and connection of peripherals supported by Athlon II X4 645 and Athlon 64 X2 TK-55.
| PCIe version | 2.0 | no data |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Chip lithography | 45 nm | 65 nm |
| Power consumption (TDP) | 95 Watt | 31 Watt |
Athlon II X4 645 has 100% more physical cores and 100% more threads, and a 44.4% more advanced lithography process.
Athlon 64 X2 TK-55, on the other hand, has 206.5% lower power consumption.
We couldn't decide between Athlon II X4 645 and Athlon 64 X2 TK-55. We've got no test results to judge.
Note that Athlon II X4 645 is a desktop processor while Athlon 64 X2 TK-55 is a notebook one.
Should you still have questions on choice between Athlon II X4 645 and Athlon 64 X2 TK-55, ask them in Comments section, and we shall answer.
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